Motor compressor



menadpeezaiess" UNITD STATES 11012011', COMPRESSOR Rani Pateras Pescara,Paris, France Maren 1, icas. serial No. 659,221

' In Germany March 1, 1932 10 Claims.

sizrokeofthepistons,andtoensureasmooth` working oi the engine a portionofthe energy forthereturnofthepistonsisstoredintheform of com vair incylinders distinct from the compression cylinders. so asto formcompensat- 'Ihe chief object ot my invention is to providemamotorcompremorofthattypewhichcanbeItisknowxtostartmotorcomprcssorsofthat type by injecting air intothecompression cylindcrsthereof. Thismethodnecessitatesthatthe 25eintheairreservoir should beatleastequaltothemaximumpressureinthecompression cylinders during the starting of the,becauseiithatconditionwerenotiuliilled the aircornpinthe compressioncylvoir,` thus considerablythe amount oi! airnforthestarting. e

driven toward each other so as to 'compress-thepresent-inthepowercylinderuptoahigh H thmheating'thatairtoa'temperatureignitingthefuel-thatisin-l mme, so Mimledillyaftertheis started,

ugproperisestablishedandmaintained.

inders would leak into the com air reser' A 1 gases contained in thepower cylinders in order toproduceseli!ignitionoithefuael.'

accompanying drawing given merely by way of example, -f and in which: f

The gure is a longitudinal sectional view oi.' a motor compressoraccording to my invention.

As shown in the drawing, two opposed pistons f 5 Il and I2 move with areciprocating motion o'n the'one hand both in power cylinder I3, and onthe other hand each in air compression cylinders Il and i5 respectively.Said pistons are connected through mechanical means comprisingconnecting 10 rod 6 and a lever 8 oscillating about a spindle betweentwo positions making between themselves an angle smaller than360.Piston' I2 controls, at one end of power cylinder I3, the ports 19,' andpiston Il controls. at the other end 01215 said cylinder, inlet ports2li for the scavenging air. 32 is a device for feeding fuel into thepower Pistons Il and I2 carry, on the side of their compressing laces.inlet valves 2I, and during their outward stroke, they compress the aircontained in chambers III and Il! of cylinders Il and i5, and dischargeit through valves 23 into conduits 22. v

Onthe outer ends of the compression cylinders are xed stationary pistons24 and -25 which engage cylinders 26 and 21 provided in the main pistonsrespectively. Said. inner cylinders 28 and 21 are connected, throughconduit 28. provided with check valves. with a valve 2l adapted to berapidlyopened and which can either shut oi! in a tluidtight manner,conduits 2l and 29; or bring j them into' communication withalcompressed air reservoir through passage 2l.

When valve 2li is closed, the air contained in cylinders 28 and 21 isalternately com and. expanded while the machine is working.

When the pistons reach the end ot their'outwardstroire, the air presentin cylinders 26and 21 is compressed same as the air which has remainedinchambers III and lli of theaircompression cylinders, and pistons iland I2 are, pushed back toward their inner positions with such an energyas to suiiicientiy'compress the The function oi the air cushions istostoreinaknownway, a-pdrtottheencrgy necessary for the return strokeotthepistons.'

The-walls oi pistons Ii and i2' are provided with ports 25 and 2irespectively, whichconnect cylindersv 26 'and 21 with 'the atmosphere atthe end of the inward stroke of pistons il and l2, through ports 21 and"respectively, provided in the air compression cylinders. Y ..55

' sure in which has a determined value.

'Ihe operation pf the device according to my invention is as follows:

Pistons Hand i2 are brought into the position shown in the drawing, thatis to,.say to the end oftheir outward stroke. Valve 30, which issupposed to be, closed, communicates with a compressed air reservoir ofa given volume the pres- Valve 30 is opened and the compressed airrushes into compensating air vcushion cylinders 26 and 21, and pushesthe pistons backwards toward the middle part of cylinder I3 with such anenergy that the air contained in that cylinder is compressed ancfreaches a high temperature. The fuel is then injected through 32, theignition takes place, andthe pistons are then pushed outwardly by thecombustion of said fuel. The air present in cylinders 26 and 21 iscompressed and closes valves 33.

At the end of the outward stroke oi pistons Il and I 2, that is when thecompressed air that has served to the starting of the engine hasexpanded in cylinders 26 and 21, these cylinders are brought intocommunication with the atmosphere through ports 35 and 36, so thattheexcess of said airis allowed to escape to the atmosphere and thenormal conditions of-workingof .the air cushions are established.

Furthermore, these ports :s and as campen-L.

sate, at the end of each outward stroke of the pistons, for, the valves33.

While I have, in the above description disclosed what I deem to. be apreferred'embodiment of my invention, it should be well understood thatI do not wish to be limited thereto as there might be changes made inthe. ax'rzang".^ment, disposition and form of the parts withoutdeparting from the principle oi' my invention as comprehended within thescope of the appended claims.-

c What I claim is: I

1. A motor compressor comprising in combination a power cylinder, twocompression cylinders, two pistons adapted to reciprocate on the onehand both in said power cylinder, and on the other hand each in one oi'.the compression cylinders respectively, a compensating air cushioncylinder provided in each of said pistons, a stationary pistonat theouter end of each com- .pression cylinder adapted to engage said lastl.-mentioned cylinder respectively, Aa compressed air reservoir, alconduit extending throughout each"of said stationary pistons, a checkvalve at the inner ,end of said conduit opening inwardly` intosaidcompensating air cushion cylinder, a pipe connecting the outer end ofeach of said conduits to said reservoir and valve means for controllingsimultaneously the iniiow of air from said reservoir into said pipes.

.2.'A motor compressor according to claim 1l further comprising mean-sforv connecting the compensating air cushion cylinders with theatmosphere at the end of the inward stroke of the first mentionedpistons..

3. A motor compressor according to Aclaim in which 1the compensating aircushion cylinders are provided with ports openingintoA the atmosleaksthat may occur past phere and so located as to connect the lastmentioned cylinders with the atmosphere at the end of the inward strokeof the rst mentioned pisof gas under pressure, means to connect said 16source to said cylinder, and a check valve in ,said

connecting means to prevent the escape of gas therethrough from thevcylinder to said source.

5. In a device .as claimed in claim 4, said compression cylinder havingopenings therein con- 1.5.

nected to the atmosphere, said openings being l uncovered when the motorpiston reaches compression position.

6. In a motor-compressonla motorcylinder, a motor piston slidable insaid cylinder, a com- 20 pensating cylinder'and a compression piston oneof vwhich is slidable with respect to the other,` means to introduce gasunder pressure into said compensating cylinder, and means connecting'said pistons whereby relative separating move- 25,

ment between said compression piston and said compensating cylinderunder the-pressure of the gas introduced into the compensating cylindermoves the motor piston to fuel compression position. .i 30 7. In amotor-compressor, a motor cylinder, a motor piston slidable in saidcylinder, a compensating cylinder and a compression piston one of whichis slidable with, respect to the other,

a reservoir oi gas underpressure, means to con- 35 nect said reservoirto said compensating cylinder,

a check valve in said connecting means to pre. vent the flow of gas fromsaid compensating cylinder to said reservoir, and means connecting saidpistons whereby relative separatingmove- 40 ment between saidcompression-piston and said compensating cylinderl under the pressurelof the gasintroduced into the compensating cylinder moves the motorpiston tofuel compression posi- `iOl'l. 45 8. In a device asclaimed inclaim-6, said com! pensating cylinder having means to connect it to theatmosphere when saidv compression piston and compression cylindercomplete their relative separating movement. Y

9. In a motor-compressor having a motor piston, a compensatingcompression cylinder, pressure in'which tends. to move the motor pistonin a direction to a position in which it compresses the 8.11'4 withwhich file l i8 t0 be burned, Source-51jl of gas under pressure, meansto connect said source to said cylinder. l A f 10. In a motor-compressorhaving a motor piston, a'compensating compression cylinder pressure inwhich tends to move-the motor piston in 00 a direction to a position inwhich it compresses the-air withwhich fuel is to'be burned. a source ofgas under `pressur e, me ans to connect said source to said cylinder,and means in saidconnecting means to prevent the escape of gas there-35- throughyfrom the cylinder to said source.. VRAUL P A'I'ERAS

